{
  "manageEntity": {
    "action": "Save",
    "entityId": "788878403",
    "entityType": "Track",
    "nonce": "0x04735c261eb90d7a96e993b99494850340bd7627c3b6cb5ffe3e6bdf2fd083bd",
    "signature": "0x660cc247e155dec7a64940e5c716ed3f294fadd4c1c698d33ec2360b4270035f7d99f59f1371d30dd556fc89967a7e9d8a4d25564f846ff4c72d56845e3999631b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}