{
  "manageEntity": {
    "action": "Save",
    "entityId": "1558581793",
    "entityType": "Track",
    "nonce": "0x0e4934c0f3d81f86453d4c9cab0901a9b9c95bde59b1bc994e9cee8272ea3a48",
    "signature": "0x41f15b1bf8fde04ea53ffdc6cbb8bbe5e3ddfdfd60903a51f713c0dce81511fc7ff7aed51a8687fad43bc857301e07c5f8ca7436e8bf18989742d595ee13875f1c",
    "signer": "0x3FaF69001C3D47D6De60585DA3B6dd3E0ECEC260",
    "userId": "230914927"
  }
}