{
  "manageEntity": {
    "action": "Save",
    "entityId": "48433635",
    "entityType": "Track",
    "nonce": "0x52cbe3d4a2dd1f46155084badade6cea833e792566187c2c197eeeb38a75fedb",
    "signature": "0x1d777d5311c18f05c4aeeec4f307beb577c9d012d6cda6ed0931e24a6b021d1873942f86a62226464a65de5a0bc47aa52b04b2537faa5ed4651c7da8f0a7a3171c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}