{
  "manageEntity": {
    "action": "Save",
    "entityId": "631676903",
    "entityType": "Track",
    "nonce": "0x3c553664732d37ed801b2e195b08d0d94185a333b79840e4545307a96ad32688",
    "signature": "0xa774d90d95187d08320db290ce293b7b1049fb5df67f95f0e21bf7c64b2bfa157fc586865da674914c6e4340ab623012fda82ae3216cb0dc0d5ce97db4dee8561c",
    "signer": "0x7e1F8Ad5AC71ff7ECFaaB54D7C2Ca8C373DeD528",
    "userId": "674981811"
  }
}