{
  "manageEntity": {
    "action": "Save",
    "entityId": "1098846257",
    "entityType": "Track",
    "nonce": "0x554bc47a9083000203c98e2e0681e3e4e4101c9af7a63bc15a5d2a0f84a1a681",
    "signature": "0x71295e4a82093973ce6fe13b3d1c98c077575b6a5bc4caa6fffa6dca213bc03275ace5e3c6bb1a5d870565ab48c982d62966d9bc44c26fa7d64743971938b0171c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}