{
  "manageEntity": {
    "action": "Save",
    "entityId": "702199",
    "entityType": "Track",
    "nonce": "0xd926c23c2cde943d2a8b6cb06a6780c701fa015db1e6487da630ef60381aa916",
    "signature": "0x4c2d824647454d357108cf8b9efa60dd8da28e51fb57f9257c5276f5729b57ba5ac36736e6c21635dd3c71d8f19d8a2ef8e7fa14c7f833aab739b9fac0238d571c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}