{
  "manageEntity": {
    "action": "Save",
    "entityId": "1872366663",
    "entityType": "Track",
    "nonce": "0xddcc8e9f7427b308320081783a457d87b24c5f93165217877436a8ddf64c4186",
    "signature": "0x8390cd2d29b2e743aa5f353638d2b96c5540a1e353d67cc3b5f96875a3cfce354c315e43f8b4cb2366f574c5f8ce1ec98f4177166780d77e99feb409f4c66cb81b",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}