{
  "manageEntity": {
    "action": "Save",
    "entityId": "1858786186",
    "entityType": "Track",
    "nonce": "0x44c31349cc09cb634aacbe0d0561b1545463f50efa59ae5dae9c7bca766004e9",
    "signature": "0xed915ea7ee49fe9f88aa34b8ddea0d4bfe1c63b476a0be8e8583a1391b606cc5490ef63929a76e70daa1be717fc7ca187d3a7d6f82a72df891d5c6b2dd5a65cf1c",
    "signer": "0x8a278E79c8E7e655B94c3e6798972A44Daa2c6ad",
    "userId": "24098924"
  }
}