{
  "manageEntity": {
    "action": "Save",
    "entityId": "528707381",
    "entityType": "Track",
    "nonce": "0xf778446af3109e8d91ce36130febbd820e885339b8a84981e0b25e2f81714caa",
    "signature": "0x82c5791ba72d15a63378261d974f9843d52fbb931dcae9952da6125e4b51d40e6f581dba3e3988b585fa9c6d513992d82614377ddcc674a2c6a284595843751d1b",
    "signer": "0xe2f5823cd8CD3920EE97E96BEd5992DF72260E53",
    "userId": "755617883"
  }
}