{
  "manageEntity": {
    "action": "Save",
    "entityId": "597584263",
    "entityType": "Track",
    "nonce": "0x4dc8624c132f57ebc9b31087f83f7f387d0c6799b51709ac1ebd5ec5a9e25bc5",
    "signature": "0x06db223ced0781276ff8a36081a4589b51200fb94824ed00b2301474e4c7d59a6f65df4aba88473d5b6ad17ee352bf7fe1b54a14a00b3642fa2cdcd1051dba181b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}