{
  "manageEntity": {
    "action": "Save",
    "entityId": "82127301",
    "entityType": "Track",
    "nonce": "0xcc9484ea0eabfff322cd35cb6ac8efbacd85e1df0a7fe3708399a0a456fc7cf9",
    "signature": "0xa0d9461112a86abb0c51e303e9104e04c389108e891bcb18db0371d4d431a26631a67fee0836443d5a2083bad6cae86daedf5b44be8d3400e634c8609b2be7691c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}