{
  "manageEntity": {
    "action": "Save",
    "entityId": "885404040",
    "entityType": "Track",
    "nonce": "0x5428c80c8831b52134815ab3c966dbac372160e197de4b1cef3a5b11303c4601",
    "signature": "0x5ab93886f91ed3f49b1816b4a5e8cf901d989eadde193f1e5b946bf31f87cbe61122ac98fec391e05bc354f8e2d8599270a26c6d86b254a8298398093f7a3fb71b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}