{
  "manageEntity": {
    "action": "Save",
    "entityId": "193291",
    "entityType": "Track",
    "nonce": "0x315fdab07b1e589291cb57847f398e0a90a9e15fdd4565eed9d9973db43dbcb9",
    "signature": "0x3a86581f3d83d165defe95b4c434cd406f937c0ae9c4044008d7b51057f856ab2e3a4fca68b8c75999a3ff06781b39e866272e7bc60d56f9178c822adc2233761b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}