{
  "manageEntity": {
    "action": "Save",
    "entityId": "1616159913",
    "entityType": "Track",
    "nonce": "0x1af88c3445355f91d38b5e3756a741147b048596e059167796c78feac11afa91",
    "signature": "0xcd5f5ef71baf324219380bbfe5d41a1ec11c999994246856d18df1ba59e74ef50616b66d486eb8d42c88ea762780be7a8b1738baf869d61a21e6e3e4f770247a1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}