{
  "manageEntity": {
    "action": "Save",
    "entityId": "382981363",
    "entityType": "Track",
    "nonce": "0xfa08057282643db169e5d3efbbebbb331042ce94e9532fef841e6c1a8bfc1596",
    "signature": "0x52fa43a385ac7744968661bdf2266623d7f34bae349bc1088681d0bf1282c6be3cba04b8c609dd6041733b22a93b10b3a98bef8072cfc5a308ca02da702410511c",
    "signer": "0x019ff76C6e9072A7b7ee22fC684b4B989b8ea3b5",
    "userId": "775276681"
  }
}