{
  "manageEntity": {
    "action": "Save",
    "entityId": "2006691644",
    "entityType": "Track",
    "nonce": "0x71095e57c363baddfc2083cd7ad73439a9da7782670db9b90c3aa5a4bf94334f",
    "signature": "0x6777a6116d93799260bb278db0f857368ac32a2365200738638a584313a0d06e53c47e69e8787e759b6d8404b0b811008bf9e7146786bf46dc4b42e853ca115b1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}