{
  "manageEntity": {
    "action": "Save",
    "entityId": "618046",
    "entityType": "Track",
    "nonce": "0x13d63ec6b82ca03ea3226daf925a923bd5fac2f6d81fe0818be3053e5bb58df5",
    "signature": "0xbc5235546f2df5b0cc605fe0d94a1ae51cfb7d9a4e78e73244afdb5f3150f04e2fe8a579547c6be6b98c9b972783895698b1d98551b547e75b74518c347bac471c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}