{
  "manageEntity": {
    "action": "Save",
    "entityId": "1598628629",
    "entityType": "Track",
    "nonce": "0xbbd7cb3e3ea5fc3a3f1ab0e4d48701554eae4cbb8f6b30d6e45cae74fb77eb11",
    "signature": "0x044d26d2bbe4c36a557aeff63fad9e05a52e287f991419cac8233b2fb44635af78748573e0e97269d04caaaacf079642e44015496dbae3132346ff9de4d521091b",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}