{
  "manageEntity": {
    "action": "Save",
    "entityId": "970582944",
    "entityType": "Track",
    "nonce": "0xe9c6a12328949af0dd7568180835d532e1ddf4bd135b811563b04e9cf96041f0",
    "signature": "0x2ebcc47c34f50a4bdacab84f261b1517aca86a3c4cc50fbb1a6a66ea3bed69e30d461398b953ec98796c78a5fedcb6049a75d7676ecb05ea3cfec597058037f91b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}