{
  "manageEntity": {
    "action": "Save",
    "entityId": "1467218021",
    "entityType": "Track",
    "nonce": "0x3349fbbd97bf4ef2e769114ec65abe4db1b1647ec3bd0b84bd63be2255fefe24",
    "signature": "0xa539d74b3b99a44d3a3e3c646cad341a50e04999479a53f9963a2085701bbd7155b981f292d632bcacbc3efe1a124b4c54fe68b279b49737b678fc1e53cd62ec1b",
    "signer": "0x8dE618Aa8371041f23D771609990F5D2Ee1aDFDB",
    "userId": "688960593"
  }
}