{
  "manageEntity": {
    "action": "Save",
    "entityId": "228427",
    "entityType": "Track",
    "nonce": "0xa674be096f7b0704b4af7d31f6f2c264212eb96e40faf4ef91ab5de020b35fcf",
    "signature": "0xc10beca0e8f7652dfcfe595da1795bda484409c1bd331ca3f3037289198fa5c428eed65d23fd99f07f9e2fa75932199f76b291c79f9de5165ce3b208bcb2e8171c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}