{
  "manageEntity": {
    "action": "Save",
    "entityId": "1867820435",
    "entityType": "Track",
    "nonce": "0xeeeb95d06a8530e1a074a9f9e73afcfb6f8a1847df7e35372514bbe7f2107178",
    "signature": "0xabe922a188334f86af23ad5ae9d0d005c1a3ad1767b0410d83174d95d72d7b814641b23ec560fa6cb23d58aff87afa46319d2f3cf37eb63edfc6421fb3d730cb1c",
    "signer": "0xD82Bd74003e6b0E270326eacfb14fa0372EC70D1",
    "userId": "943263428"
  }
}