{
  "manageEntity": {
    "action": "Save",
    "entityId": "1199968326",
    "entityType": "Track",
    "nonce": "0xf5540cac046c24854ce494b6a69f7c2e2b6f2d36fe4b8bc05db8089331f75408",
    "signature": "0x4bbe626581d690eda0e2f3ec6ef3a3f53a5f43341e231564b7facc0eec134b121a50e486d9c26a0b5e4289e7ba468a5d84f90bd441da0e3d38ac1ee4669fcb541c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}