{
  "manageEntity": {
    "action": "Save",
    "entityId": "1341890063",
    "entityType": "Track",
    "nonce": "0x51a3f74cca2720560a2bf74b8ff578eff91b4ca809d4d5093afb6b3048951957",
    "signature": "0xf5cb596f2ed5eec25f99c3eb572a8166bb32686e3684c18ded010c3e297a09017132330a2529256b4ef3d02bf8e009de8abc0d0a1dfbdac295380f4a5c5234151b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}