{
  "manageEntity": {
    "action": "Save",
    "entityId": "1605946302",
    "entityType": "Track",
    "nonce": "0x03b237bc0ddc19f6b9f9288efcc4899ecb912eaefa6e3310a1b89e4aca96e82b",
    "signature": "0x8f04b7ff730f006d569b55aba73d7e102887952b5514b3b7823bc91fa2524cef23dd77f07d791e16af5a29c138f98037493f91ec849c0e98d28f5ede1ea322b51c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}