{
  "manageEntity": {
    "action": "Save",
    "entityId": "97874510",
    "entityType": "Track",
    "nonce": "0xa9c2122e9c062d1c9ed02646abccdc8edd5817790c093d160ecdda8f8ed011e8",
    "signature": "0x1cb4e83edc62009ff974524f07f3857759dd433401d2b47d1b0fd1ae874ba2825c0c4d895231f313a41e0993fe9939fac68ca58a17fb37a03a37b8ad80c715f01c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}