{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247822444",
    "entityType": "Track",
    "nonce": "0x65f891b186dee5654ff36cc0f2956000f83d99c250de17f4938a958b6267e9e5",
    "signature": "0x9edbedc70efb1ff979ffc84ac67e2482d369b44573f1befa47c0128b594e7b084c2063020c3937bf42d9e2d02af8497d23f256aece7db62421bab11d012be1cd1b",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}