{
  "manageEntity": {
    "action": "Save",
    "entityId": "1914466859",
    "entityType": "Track",
    "nonce": "0xdae7c810d3edf0dfb9b531128e7e1684bda90ed2ae95c0f3a1de082cd0309f84",
    "signature": "0x57ae081f27010138db2e80a6963cf9ebfa672697efe71ca4583f392c2a5edbed55ebc6261c1f385192273a56c80c1b1c6eb22a88103dd4e966538c81f4892f011c",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}