{
  "manageEntity": {
    "action": "Save",
    "entityId": "679252240",
    "entityType": "Track",
    "nonce": "0xf7a34dbee1eac1ccb5a9fb0a9d70d1fdb1c3946f8081baaadf9a361a05a8d4ef",
    "signature": "0x2d9bb5ed36f4b987c6a2570e469cfeed86fc3ea3102cf88c145758ce712d94106b47b779ec0dd7b281a2749bbdb9ce5ea3e0306eec4b81223d5ee07a25abfe271c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}