{
  "manageEntity": {
    "action": "Save",
    "entityId": "311118875",
    "entityType": "Track",
    "nonce": "0x2f170431574540601b1d4c47eeae8a092cb300a25085c7e5509f150791f33732",
    "signature": "0x40a56e47ca75cc37f783ac7a0d78ba6717493d46be808228869ef3570f4a60b420b5846480b7520ad1fd2b9c6203194002188a1474111130be831f234418d26b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}