{
  "manageEntity": {
    "action": "Save",
    "entityId": "345616833",
    "entityType": "Track",
    "nonce": "0x7e2a07e412672ff85d2dedf769726fb60077323835a18c02c09b3cd59b1c91f5",
    "signature": "0x35d65042320866c89f25ce079685156c2ec5cc55d9bed40a4e06346a32c41428652338e3a3f66b527b25607045fd6c76cc131640c5e3bbad9e3bdc863e528a2f1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}