{
  "manageEntity": {
    "action": "Save",
    "entityId": "1377386686",
    "entityType": "Track",
    "nonce": "0x0b24336b775d614b21804e9612d1d600c49e6ae7cb169207c30e080903553609",
    "signature": "0x822053abe27b33fe828e001c7f1dcd4fcb9499b1ffef4c281203f964a5ec2afe79608c43f61f05871e5cf315ecb1b8434c40da33d753480c3aa5c05cb6f979581b",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}