{
  "manageEntity": {
    "action": "Save",
    "entityId": "881042614",
    "entityType": "Track",
    "nonce": "0x465f41000c8b53bec4648cf0275a84d7830223a1803ef198fb8d00bed3dd229c",
    "signature": "0x2b34a6deeee85326d607c9e1fd0a5ff8961c959db8c0255b34910621b2e83ee14beaa9dd4708716bebd59a6ec11ae601a2122e47dbb6dbd6fd66e1aa0b4a435b1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}