{
  "manageEntity": {
    "action": "Save",
    "entityId": "1516604827",
    "entityType": "Track",
    "nonce": "0x4bb00e81fc3f6ee44873807db970f0c75c7b99864138a800049df6b039b52a75",
    "signature": "0x680b85e384cbca01de871047d656a26cea46465b52a93d7c523ed93269a4185822ff3ad9ef10e940f2ccc48183cd77960800fac124e2e05e575213e3724626411c",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}