{
  "manageEntity": {
    "action": "Save",
    "entityId": "994008532",
    "entityType": "Track",
    "nonce": "0x7017b8ccea8dec3ed29ac94cc0fee79bed2b872fb2a901b9f8f1c9e3d0b241dd",
    "signature": "0x932b92eafc4f1f1a0a597496a98f2c21334dcbf2e62baf4270e829f795646f646d0a4c8ebf9df6497c26b6d53210707446249d4e012ed3d84ccbf300b5ffeff71b",
    "signer": "0xB57F94Ef9a26d73E8b35D3f37FccD18BcC7eeE00",
    "userId": "850416615"
  }
}