{
  "manageEntity": {
    "action": "Save",
    "entityId": "1425663818",
    "entityType": "Track",
    "nonce": "0xdaa5b1b806b81bdfb8d44b00b34463731f40faf9d40f7a614b2f826ce7492f12",
    "signature": "0x3e650b1a9d82657aa8c2ffbb2df5f9f313cce6ed52f73fccdbcbbe9ae6625016471a3d7e7e051fd6e37f9e8c3d4cb88e488e158e95f0f8df936355db8c650c741b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}