{
  "manageEntity": {
    "action": "Save",
    "entityId": "85909090",
    "entityType": "Track",
    "nonce": "0x4357ae80b6f4b9fd4ad5fba9623abf4c3a55ef81b0e425b49afb55aebb1622c8",
    "signature": "0x6d65113819e6defd3873ae2042c4237c1762d6ad0e050a63d29e776e8985184b5af5b51f5e8cfb45c614e9b81349c8e6e7b2275296719674f97a75acae4b29001c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}