{
  "manageEntity": {
    "action": "Save",
    "entityId": "1699819801",
    "entityType": "Track",
    "nonce": "0x2b366289126917d8ab882f43b7967c3bf30d4e2fefe61abccb2813481abfb97f",
    "signature": "0x2f25e03e8a9b4d4afc91c767381139ef4eea04f01a45e23c4ed239ca1866b870765f98c536a5f2332f1098a6dd203f9dc6e9f0bb20ed0e273cf78ace74bd7a341c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}