{
  "manageEntity": {
    "action": "Save",
    "entityId": "143983834",
    "entityType": "Track",
    "nonce": "1790358431635021648",
    "signature": "0xa078c12ffdc8fce50df5ad133ccde9788935f166eb231f05a922670d6b48fa027adf66dcba5ce3d6450c34f94cdce1ec275550ac5365b10a3ad0a14fa7c0ccd71c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}