{
  "manageEntity": {
    "action": "Save",
    "entityId": "1974008007",
    "entityType": "Track",
    "nonce": "0x3a68ba3a75e1b0a427d98652a1cc8d1aae1da8ee4024e64978d44bda2d49c2c7",
    "signature": "0x215b319898660c809de998d128787774e257f295954f236b30f26bddbeae83aa2d5607a118ceea765e6af2ddf1d724494478ab18537b7fb23dcfaa70630d8e6e1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}