{
  "manageEntity": {
    "action": "Save",
    "entityId": "826574890",
    "entityType": "Track",
    "nonce": "0xb2838ca31aada05c99b9fc4553d6aa415c12b061dfeba462fe0abd17e8e05c3d",
    "signature": "0x4fe872eaee9c2116dbcb72429d0ad8243c757c5d22e95cc3e99c5653b797584521ac238ea9c25af769650f5164e14dd46e354a8ac21ef13a6fe92d6545e19b071c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}