{
  "manageEntity": {
    "action": "Save",
    "entityId": "1195441630",
    "entityType": "Track",
    "nonce": "0x8db935b6b9898c77e988261930e1b2c57e20767ff7698ee8dc641c07ec37fadb",
    "signature": "0xa9c4d9f633816d2b942ce60d4c8933ac88d21353e7812c98bfe20d094a72255d7abcd60d8f4ed04e68acc1dcb2738178eb9052f4fc3595a9317507fc89139d501b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}