{
  "manageEntity": {
    "action": "Save",
    "entityId": "958489396",
    "entityType": "Track",
    "nonce": "0xed87466821b58b0eff51e4f1994ea4e2f01f90f94db674802f671e7924679d30",
    "signature": "0x4d8171d7bf52677776c4312d6e31e3b1c2ad3efc6cf3f24e741d9b7d5045ac831ea7a7a899aa33d4e615f1ffa9975b5a05c5f2d1fd78864661eead138fc0f77b1b",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}