{
  "manageEntity": {
    "action": "Save",
    "entityId": "1140158945",
    "entityType": "Track",
    "nonce": "0xa7ae17d2113a0732eacd6423309e37679b87424c166a6f365fc9fd442d7f1c2d",
    "signature": "0x92627cf02edac7f7b309e2794b923139fa1fe0403736470ed980eea13cafded47b3603dfc0b19f8a3ba52f97dd1479b04f8697eae057a8ac25afd4d7dc70ea4c1b",
    "signer": "0xBe0B2B2beC4B0A46ff11169512DF7f66E775c0B3",
    "userId": "196632465"
  }
}