{
  "manageEntity": {
    "action": "Save",
    "entityId": "690943",
    "entityType": "Track",
    "nonce": "0xee8b3fde643a23c3f8317e49b95bcb9419099f46508e927b0df0ab8df43c76e5",
    "signature": "0xd68b50cf33266f7eb1d0f78fb3b21752d78b5ab67df91cce6b6379a5cb902c9f43e1c52476681d39a900ae7156aee52f3f9a94d43cb552631a205a0861dadb631b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}