{
  "manageEntity": {
    "action": "Save",
    "entityId": "871016103",
    "entityType": "Track",
    "nonce": "0x4a2856cd29e829323ce5a0bd4c3ba1dd7fe4de844d89cb767cc25450368b5f80",
    "signature": "0x4ee41cb43a157660453498ee47f818c004160d183fc85f47ee54f0c7302718942cbce8cadb07893f992dc501633e1e7e5e47c05f28e11d5b293a686655c2400b1b",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}