{
  "manageEntity": {
    "action": "Save",
    "entityId": "1465397963",
    "entityType": "Track",
    "nonce": "0xc72a71b546208c1413cca39afb144aaa79e744f1999888cf57de6d8412de6b7d",
    "signature": "0x18cb9fe98d6c066894eba11129e62f96947cd923f27ead73d15192f8dba9c65d25741c51135485e27b455b9f8a7cf420b014b3e4ad697360e20a9a3c64a27f4f1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}