{
  "manageEntity": {
    "action": "Save",
    "entityId": "251568",
    "entityType": "Track",
    "nonce": "0x783f88d8e1231a7b112cb5326644cb612de7a41f005f5336fd7445dc2f446bf6",
    "signature": "0x53f07fda91777a1d04fa9e2ba18f5f3560161c830895fb697179e1e9719cc00e29731e6af50f2cba227d2a6ebbb6c3ed23c04e7e4fd126cdafc693532d3a07491c",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}