{
  "manageEntity": {
    "action": "Save",
    "entityId": "1408614663",
    "entityType": "Track",
    "nonce": "0xa122662eab0952e79e3980183272fd9294d2481c8e744ecfcbb1fcb61be37a0c",
    "signature": "0x8e2aee89c44dd6ddc3f1f6188a5d8459d8ab02b947cd82b210bd82c8b032400d292a00d99cdfe8683a31d409d83a0ca707e65435b1b640eb31ef3c1bc64464661b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}