{
  "manageEntity": {
    "action": "Save",
    "entityId": "73922888",
    "entityType": "Track",
    "nonce": "0x2ee76f7773ffbed3d2d7d5196a769fa48a783bd481c561a8621321188631c45c",
    "signature": "0x9d38bc27974be54c75c098886eb55d17c8e28e6e9dde1f4a69193a7915e6aa035296ff540a1f6ca79565763c417ad7237bb3eda37e1bc3e7789cc2845e7965a31c",
    "signer": "0x253047c0af4Fc72D6658Bc16df0b3FE0dB459513",
    "userId": "186198383"
  }
}