{
  "manageEntity": {
    "action": "Save",
    "entityId": "542971",
    "entityType": "Track",
    "nonce": "0xa29dbc2dde4c5ab79a3271c6a66a0573ac95adf8098fd6d4aefe5059d5b28b7b",
    "signature": "0x3a9cbb7147adc5eea75b6b9904974422d2cc1f3c0b6dec51f86111f0db6fc8524fe604010e1d94143a9a689b4b3d2ce3bd2fdc08b02174579e243cc4416860a81b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}