{
  "manageEntity": {
    "action": "Save",
    "entityId": "1649231259",
    "entityType": "Track",
    "nonce": "0x50d7a06ce72d785321e15e2e9a5e03c95a7ea884bf6817a6944b3db97493924d",
    "signature": "0x76a1deef7ca5579ec2f21105228f758ab518fb36309903c16604a5fe72e7b35918bba03b83d7ed5fc0532c62e3b4d1fd0cfcd29113dfa1bcb6f14d66e3aaea4f1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}