{
  "manageEntity": {
    "action": "Save",
    "entityId": "1918499446",
    "entityType": "Track",
    "nonce": "0x00d2298a52712e5e8de2248ececb70e3f48dc7852f31331b29d6be666f038440",
    "signature": "0x3d9591269dc293a6585b97a1ef8b7f2cbe14537bfb0010c41aba3d9bbae405f718fc5880ab04db22536c5921a956367b49438dbe4e14cc78740124f215227e1b1c",
    "signer": "0xca797dA7dCB793742623d55EA81fb92A9566B550",
    "userId": "363062902"
  }
}