{
  "manageEntity": {
    "action": "Save",
    "entityId": "130155527",
    "entityType": "Track",
    "nonce": "0xb12008e6dbbc7dc3b5750297acc25116342403cdbf6a54d4743d4e5a38e32e17",
    "signature": "0xb46b820f781aa336d75f1d16ffc73010d4ec359a0fc2ee454dbad23862e404ee550fbaee5e8f12df028b3c58f07ed449e5f3dbfdc9102ca1ef977b78b30b68451c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}