{
  "manageEntity": {
    "action": "Save",
    "entityId": "322034377",
    "entityType": "Track",
    "nonce": "0xd35f58a977c1fc2c309deb5d353492dcfd6d2c31c7e672742043557cc2b2463b",
    "signature": "0xf077641dc92e547271a6c0f7abb52177f2cb24f1de9a2e2039d8135d8535f77a05642bb072e0423f31d205a16f08ab41abd2c58a619922cdac939b693497ed5b1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}