{
  "manageEntity": {
    "action": "Save",
    "entityId": "330262",
    "entityType": "Track",
    "nonce": "0x67b951dc83365f113c85559b332f1c8421cf12884e1278f0eb9804cd3be033b1",
    "signature": "0x57e6b567e28546e740243ac32bfdcbef31ca8f90aa2c83fc331442a70f272fca1b4850064ead3627e72b4d03dd858cae155b3138f7ec3223168d5e439c48079d1b",
    "signer": "0x7848c1438a663A70aF2A2B1e61f7A9229dcc818e",
    "userId": "490080902"
  }
}