{
  "manageEntity": {
    "action": "Save",
    "entityId": "57313303",
    "entityType": "Track",
    "nonce": "0x78ffe50ec728703104031e1362ea77b5f46c47e58bd82e3e5dfe80ae611dee53",
    "signature": "0x523ac43eb379cf4accbab2fa83e74643d3486f8cd446408c6ba904c16a7f3849071dfb7233e3d2d2f446355980d79c438e1b6b64a92c39ff7905e491f292dac81b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}