{
  "manageEntity": {
    "action": "Save",
    "entityId": "1350029548",
    "entityType": "Track",
    "nonce": "0xcab9fa7270b2e966d06ddf581005883dfd76ab05c1fbcb1b57e0c27898aec6aa",
    "signature": "0xc4f34b03162eeaa5add53b471229e6006fb4a6cccfc8213a2e2ee6864e2bb4e3645d9f5294c14f1474a6ac4b198bee7fa6c0408cc4d25529b5d050bce3f020d31b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}