{
  "manageEntity": {
    "action": "Save",
    "entityId": "1630833563",
    "entityType": "Track",
    "nonce": "0xc54081c34ba6787224f4ee7ecf697fa72af88474ef3be41af99c09d15b20685e",
    "signature": "0x67f9729ee6062740f376d95e485fdeaace25d03e4209ac71d3bd3e0f6749e8ec3f7d5671b5a40601867f53d50a8f1e641153ae4087f5326278d67cda96f27cc41b",
    "signer": "0xB18b1793545F350C53589f5BA9BfA143b7F15eE5",
    "userId": "417591612"
  }
}