{
  "manageEntity": {
    "action": "Save",
    "entityId": "53374814",
    "entityType": "Track",
    "nonce": "1794073025392052298",
    "signature": "0xa05c54d5e77e153324b313a67551c0ca0384000bc014d7d7a0ec988ec49ff58c6c18390e34fc927d11020330aba08106e425229ac68996067b9a11e5bdb830f61c",
    "signer": "0x759D1eF673Bf1d42Ab5912361AD771BDb56E9256",
    "userId": "263887417"
  }
}