{
  "manageEntity": {
    "action": "Save",
    "entityId": "1233273296",
    "entityType": "Track",
    "nonce": "0x8d83febadea73da7a85d29fa6969f32f6443bc60a902f0752579a3937e1c1bdf",
    "signature": "0xe20c8c6dceb9fa6d84af2cb9d7ce649078566ad174e8edc99bf89feec57e0146512154a21222629d33e88640eaf81f1497c48762a7e093b2fc961bd9f2a394431b",
    "signer": "0xBe0B2B2beC4B0A46ff11169512DF7f66E775c0B3",
    "userId": "196632465"
  }
}