{
  "manageEntity": {
    "action": "Save",
    "entityId": "598823223",
    "entityType": "Track",
    "nonce": "0x76e57811c0d782414e69b191d639179e010e4cda6be30c9321a4a3534a323b6a",
    "signature": "0x605828a768964aa77d98f27b6d844a0fc593e97b167057df3e4c429dda94b1d3684921ae2f627d64265f27f2453b0419f9f9f4ea7b4cc659edf64335713ccf491b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}