{
  "manageEntity": {
    "action": "Save",
    "entityId": "1837948203",
    "entityType": "Track",
    "nonce": "0xbda045b174ee4c321f69f7a558b9cbc758dc1cdcce2c881b0ab428984733bf3f",
    "signature": "0xf1b41d19024081e35f9c751ca38003d51123a0328fc18b2698ee3108894069475bba87ac8c6e8782235260dba39b586aa5826b36b13045ee147beb00e230d2a11c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}