{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075202161",
    "entityType": "Track",
    "nonce": "0x833a17781953e4bad8a7c13c39a432687fb0ed6e59617037bf4ac4a39c905af2",
    "signature": "0x942ac6b4964c03d8a0f57b4fa61212c0c7ccbd5b3fbeae249361258fe2e9ccc354bc927924a361a86b047b241bea9747014d17180b8f070e594612697b48c5d31c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}