{
  "manageEntity": {
    "action": "Save",
    "entityId": "1689495660",
    "entityType": "Track",
    "nonce": "0xcd56ca4ce7ab2c39821d055faff78ab185bdfd6970ec88c08342f1e4c6c465bb",
    "signature": "0x57ada30455be7f7836919a3ed45c5311b0c03effb9e3e6111f761ba9c733692e01256925602af9e2ba574978d74c16b736d943052f6b11f17f67667ca3d0fe7b1b",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}