{
  "manageEntity": {
    "action": "Save",
    "entityId": "462590132",
    "entityType": "Track",
    "nonce": "0x51f807b240b57b240c5fd57843fc4fada6fcc7d5c0b2157aa372616993b4bb5f",
    "signature": "0x2ee75e69a226b06edf8b8e86b94958c253e5b72e99e4eb4321d0ebcc8bef1c497aee5ab4661fd5895dd0e9900daa00881c660cbdbbcbff5ff495d6f5195cc0a01c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}