{
  "manageEntity": {
    "action": "Save",
    "entityId": "696846270",
    "entityType": "Track",
    "nonce": "0xeac9c152e5fa8a14f7634c7aa2ec9f5a1f38185a01f938924a0435a613cb9d74",
    "signature": "0x34d028aa28d5af40dfb529192e3c18337376476ec34df770102e77d3098492d93cef2b8c0ac616859718f997762399ed463fbc12169259d0694a70d5b7a16d331c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}