{
  "manageEntity": {
    "action": "Save",
    "entityId": "1422692927",
    "entityType": "Track",
    "nonce": "0xf1cfa6c8c8ae41ba6cc7a40a7953ef5120fd446464560b1f1ef261a8d9ce033a",
    "signature": "0x5e6686b48fd63ae82d8363d8db8bee3f9e46444b111f7eca830cc0b39353cf6a797483bf4743d97bd34a374fcdd3aad375a56fa63e8c154e1058ec33d2d9a7961c",
    "signer": "0x87FC3581f96D45b347BB39E15f25079950C5Cc27",
    "userId": "339826419"
  }
}