{
  "manageEntity": {
    "action": "Save",
    "entityId": "1531211455",
    "entityType": "Track",
    "nonce": "0x49c8d7c86e482d5c46241c54f7c344bb3cfdcc37e63b2b99ec0bf9073c8a78ed",
    "signature": "0xb3729c770660be5b38f1d03c4c6bc69213b5e9c6522cfe8efc23f31036fde1552c270606280b848bdf03d2bc1cd0149ce84ba60b22d8887483e644c9d5b09fe21c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}