{
  "manageEntity": {
    "action": "Save",
    "entityId": "1120874386",
    "entityType": "Track",
    "nonce": "0xfc84798646937f7bb884310941f2dcb0054a2c4f9616baeada5f82669af2c20e",
    "signature": "0x51b1d19b44763044f8ce785c8345d11099d9d7bb88cb838b3ab671649578efb676c5ecdaac8e28c987f5e9e8d08f05116283a7b200d2dd7382be5996a30126471b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}