{
  "manageEntity": {
    "action": "Save",
    "entityId": "333539583",
    "entityType": "Track",
    "nonce": "0x238ab68ec6c485b0b71bcfb4030eb9a3350fde15c3efeb86ef5ba87856757de6",
    "signature": "0x0f56892980e56b63b1687286af4a3a49c2f4d65fe838237832fa4fd812b6e99c3d27642eac68d0be1389b43d9e87aaa34c2b745a84003914c24cfb750871b2c81c",
    "signer": "0x710729FafFDfA1404caB73F701487709bF33AF9a",
    "userId": "200140"
  }
}