{
  "manageEntity": {
    "action": "Save",
    "entityId": "1132357565",
    "entityType": "Track",
    "nonce": "0xcdfbbed98cc46c9f2a96aefa7dc37d976a1e57939e882eb1cc2f0ea4a323ea78",
    "signature": "0x19d0370f818b307f2a4396c6bed34d06161e3099749e629f69924a17e0e9e0b538cc63f0b41440a2a25e2c8154726e4d6e139239ccb0adacd253d31d3d85a4001b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}