{
  "manageEntity": {
    "action": "Save",
    "entityId": "2115955847",
    "entityType": "Track",
    "nonce": "0xabdbe1247e61b22bb5d042c45b285febe7b2f12f9f501a45f5aa55b82462d28b",
    "signature": "0xab8811631cd179e83380161ef7a819e20f3a3ebff074d745ef67da184d5c455b5cbbbea7f82247f502e8636d4efc7ae10fb562ac8d6ce75d9bbe00c1ad160e891c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}