{
  "manageEntity": {
    "action": "Save",
    "entityId": "1245985014",
    "entityType": "Track",
    "nonce": "0xbaab482843f1ea06284db9e58cce51523ee8576884d44a54cbd8fe1624ebba8f",
    "signature": "0xd527623560ce9e5305e3853c927b06cea3f711ee602dbc24f3ced14d3c3f2a32674c95c722b3b04960deb1e29372408b0a0284bd6f8d52a83facd682b144ca2c1b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}