{
  "manageEntity": {
    "action": "Save",
    "entityId": "1105206543",
    "entityType": "Track",
    "nonce": "0x1001141d5b33460537ada4fae0878ce8dca06797bb598b5e2cb243a7497110d7",
    "signature": "0x0a5a196b10e8027f57b0fa13a18cca1e1dfc2de47c17a6ba4c455624aa134e12602b4e750ff2df505183f5c5be1cfcf23809728159124d4bd61b21960e40bddb1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}