{
  "manageEntity": {
    "action": "Save",
    "entityId": "1944696796",
    "entityType": "Track",
    "nonce": "0xf612f514c3bcaf7763fc1aa0a61fb88a2acb5c0a05468255617b05916ae4b30c",
    "signature": "0x4c934f8e0f0d4e17df4d75b3c2fc439cd5ea661892ef53cce13f19ac82b421455f470c9c98b3af803ccd6952decabfa52ea9a9b7ceb7bb2f4ad7201b4f20e1e61c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}