{
  "manageEntity": {
    "action": "Save",
    "entityId": "333775720",
    "entityType": "Track",
    "nonce": "0x3e2bb1700cbaeb3faaac0051cdaf7254663cf595ba6358ec034b4ee15deda4fa",
    "signature": "0xf1d628c6d4abe307bc6f712731418ded5ddb9205331bd0b4f8d55865d5d1d67b5848e4a3f757f811fd2faa09761d7764f989084340765b9ed4058e90dd8d74311c",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}