{
  "manageEntity": {
    "action": "Save",
    "entityId": "598457114",
    "entityType": "Track",
    "nonce": "1792350507263874948",
    "signature": "0xa22a694852fb95e3a497edd9c8b988dc9693c8220a403616826bda034ca25e361fbc5b8e7773f1cd8ce67a2665dc5903895864513d6c92b0cf2394d7f86fbd7b1c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}