{
  "manageEntity": {
    "action": "Save",
    "entityId": "591117290",
    "entityType": "Track",
    "nonce": "0xc7a6ec2f34889ab9626040031b402cb7ec4eca7f127b794c3ca3d57d62426e24",
    "signature": "0x5b7e84b2f2a63d375555a097246dd6cfa5d482adee553c5d1cc098156c9adc317fbd2d3d0dbdd9a6c350465397097fa573c789703fc524710afa9ccdd6dafca01b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}