{
  "manageEntity": {
    "action": "Save",
    "entityId": "1404986980",
    "entityType": "Track",
    "nonce": "0xc4d5c9711d31e564b2cbfa47a30a617e7b6f28fd6e3229abe95264cd30a61654",
    "signature": "0x7c5a06b5be1dbbf85ba4b6704d6f0135966fb691e4ba861b532009806cdc11d23e2277518a856d7d729e59da527055b6b6ae18f2e6a0d079ed84e32dccf53a1a1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}