{
  "manageEntity": {
    "action": "Save",
    "entityId": "544315",
    "entityType": "Track",
    "nonce": "0x651c91eb14f86766fd256d1c71dd50f3746b08a17540bfbed6f98e0665c8cd75",
    "signature": "0xf131c3cb7996438f6f6b5182347ae747882e450f5a7e2dd0864dd3f4be74f36375fbf35153ad394155a157e6099c9d0ae4a1e857b7c2db90ee4f7bfc1739de4b1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}