{
  "manageEntity": {
    "action": "Save",
    "entityId": "1385813081",
    "entityType": "Track",
    "nonce": "0x27e3d93e3a0982562d5a12f9a5efb7892ba2475c9871a39b45d2513d03cf8a6b",
    "signature": "0xd1629d1eb5fcfdacae5fc1eae371e57396f85bd3b804f47889ca0ed8e77225de602bcd9889edf9f435771c34ec342e6e0f8990c614aad00efa3c64b8c46e14df1b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}