{
  "manageEntity": {
    "action": "Save",
    "entityId": "863830",
    "entityType": "Track",
    "nonce": "0xeb1e54c0c8b1f00af9eaaf619864c01624d68aa344a29fb55274ae7ce9bd3a1d",
    "signature": "0x1c3d66946199e784f4c1487928a4a0d294e98a520a08ebcbc12db6c8d0283ba739c2b216ce2436061c0b7a29893499bcdf1b65851fd711b15125880834c9df4c1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}