{
  "manageEntity": {
    "action": "Save",
    "entityId": "1984821525",
    "entityType": "Track",
    "nonce": "0xafb82b564291f46a16ab3f85165309debd79eae7c2f4c893f9d4e904744f74ac",
    "signature": "0xb786d30651c9d367f119bc4f6a3edd76c63d95a4c575de74d468eceff3d3b9d9165c9292162c94428730506667ed2a74d555b3f41abc3b54da369fa508aebad11b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}