{
  "manageEntity": {
    "action": "Save",
    "entityId": "1981501358",
    "entityType": "Track",
    "nonce": "0x425a1f77de64939a76c59a49e5564367c0b35ba8ca318b605f607882f72351a7",
    "signature": "0x4b15c334c65f8870b235df94fd964d356899236e4d597c6f850035b68e1d553119606e68ed7e215ea4bec245a674e6e10e8b2420654a0435c96b34b7085e638a1c",
    "signer": "0xcF1BC458908F84936B19Ca8Cf67C751CD647B02b",
    "userId": "310796"
  }
}