{
  "manageEntity": {
    "action": "Save",
    "entityId": "1428539636",
    "entityType": "Track",
    "nonce": "0xa736dfb2b33232b8d6653fe50b5b691ad0c8eb460d153d71c9352c8f2b64e106",
    "signature": "0xe2f9d56ce1b57ac335ea49584385a24aabe0785d4bee47b838150365b9413a134f477d0a00c4a1c4e024fed9f501f5de4f1dc1216f593f76e93f31af00ee36f61c",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}