{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075789434",
    "entityType": "Track",
    "nonce": "0x3225da8fcdba9c09636f901e5c02fa392add16e4ff1b51cfba00012b87597e03",
    "signature": "0x3e31a9c4ef69cf811aea2bfd6c47f1d18205b45c953307bf2a59e945457b5815078cf661b3d42a1a09ccda91995c59dd811161a978c546c3d847a1ddc22cfac81c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}