{
  "manageEntity": {
    "action": "Save",
    "entityId": "357935",
    "entityType": "Track",
    "nonce": "0xf6bcd3f6d4be42b44348da81ce092886102023b204cdb0a240716f4f5813d233",
    "signature": "0x3ba48bd8d9053e759b893c348240d3e095602570eb628b2b9b81558180670ee03d0810596f35c5aa2a4c7ce96031ee99f8e0a71719526289a3031143c642ab571c",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}