{
  "manageEntity": {
    "action": "Save",
    "entityId": "929911469",
    "entityType": "Track",
    "nonce": "0x47521eaf360e316bfe8ed25b7bc6fde0cb1d7ba009ea1a3287b7ca860a641e4f",
    "signature": "0x0bb991d293342e9b7cff39c77665846ee85718a41d09756878809a32a6bfa08b7cc48fe64445c2df4d6db26d287cf1c7788d1bc4e95e9f4e48ced39b6b20cb681c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}