{
  "manageEntity": {
    "action": "Save",
    "entityId": "1912403457",
    "entityType": "Track",
    "nonce": "0xb88540023c28c356ec6062520d85bd484d6b222715e6c136ce3048179383028c",
    "signature": "0x56032753679a6ebae3a1a3a7b1b3eb7bc7dc60cc75a11a19d7ea238ebc0aee0315e97856d0f32675a31f5547e8d62347655a6e0d55ed5c66e3ab9b1e721a8c111c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}