{
  "manageEntity": {
    "action": "Save",
    "entityId": "1214992594",
    "entityType": "Track",
    "nonce": "0x76d14df8ef5d4235b6f8aabc09d5dfa8d32b6031910d9595a2e4b73ef8ea9d3c",
    "signature": "0x32a80f6d56b713cdafc6797f47b3fefe4fd50cd74941abf89aa4035b87bac8dc49bb81dbe19aea261757a78bfa51ef37dfbd66bc3c0ed710bc032cdbcd1438931c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}