{
  "manageEntity": {
    "action": "Save",
    "entityId": "588825",
    "entityType": "Track",
    "nonce": "0xeb581167f4e4516a18f4513cb1e22ab161bdeeb328ee32646b07cdad0b274410",
    "signature": "0xa4a1bb7cd8c1ac628713531e3d3d06ba4d4625adf892657dafbfa9f17d68c00e55b5a8d8d7f998be9f9ff91254ebd9c59fa88f8b1d26ac7ba8aafa80b7d465771b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}