{
  "manageEntity": {
    "action": "Save",
    "entityId": "1833229678",
    "entityType": "Track",
    "nonce": "0x932fb7cd3c22746e40b413de9f5d3d37cc8e409a5bac9a8c4b876447b0ffc1b9",
    "signature": "0xd4ef7f290d92877ee9245b112093d59269feb7d66eba4280773aca0830434b7125e8f449e0c3bb3d78e480e146f449082af775889d8796766bf4b3e9d1afd1d11c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}