{
  "manageEntity": {
    "action": "Save",
    "entityId": "700834723",
    "entityType": "Track",
    "nonce": "0x47693c77b9b867ccbca5dabcf3050125d6556ec71aae0cf6923f173f1e0f2281",
    "signature": "0x91982346f67b01c6c2f67c7c6dfad653a59bfd31ae317d05489b51328ec761382828a5918bd7f1e377626968a68486087621c4c3344ee60bd30181f99fc1a0d31c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}