{
  "manageEntity": {
    "action": "Save",
    "entityId": "2075237461",
    "entityType": "Track",
    "nonce": "0x9581561a236beedebbff91fc825bcac31ca82f6b861acbf64c3b701267c35a4f",
    "signature": "0x2cf543f2e7b161c1ce26ffabd2e2400d3f49c3cd72144ba4c8fd79f181ab75995fe93c5a8ed089fab7946183d61501139fb46a336d23ef53a09038027f60959b1c",
    "signer": "0x89DEf460654e7C2e2BE62C963E7Af17a92c5e432",
    "userId": "937131504"
  }
}