{
  "manageEntity": {
    "action": "Save",
    "entityId": "1947776851",
    "entityType": "Track",
    "nonce": "0x71018c597c966e27badd975c2ab102f9c8760833882205f9435b629c356bc912",
    "signature": "0xca609e351ef3abf99880446546964368970be01626885805af15c2c0dad29e2e27ed88813f97fe30da284f907e9efd54ecd83a0fdd71f87d00357c5c9179355e1b",
    "signer": "0x98591a180A20DF036EB2C9D2c24B449E65939Df5",
    "userId": "338604526"
  }
}