{
  "manageEntity": {
    "action": "Save",
    "entityId": "1980719852",
    "entityType": "Track",
    "nonce": "0x445d8033911559705b1aa0e44a48bd3ce1d56104381d85642791e0d3a495d5a9",
    "signature": "0x5018c59b08a8a6c1f86dbc247cfdc75893b04fc33553302fabe3c4dde4a42c5e20a0a9b1bb485f393d48780c020bca95beb2208f2ae83e652e91578d5bb646261b",
    "signer": "0x79375D6d575fE2a038916001077f90CbAE12d4A9",
    "userId": "973873678"
  }
}