{
  "manageEntity": {
    "action": "Save",
    "entityId": "2134371066",
    "entityType": "Track",
    "nonce": "0x197d19bc6719f2d876bf8a601d9963badd5d086044593157eee451b31e32120f",
    "signature": "0x505732912dd4e8853d9e2292558395b2786a0b6758e9169a8d6c63a5b5a7b6607a6fae0e60b4e86d84ddf08eafd70111f16770f03141991df1c991353ef34e291b",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}