{
  "manageEntity": {
    "action": "Save",
    "entityId": "506368",
    "entityType": "Track",
    "nonce": "0xd5a07fe3de86892eed36c49eeabd2b27a88ebd6d915b37507501de30e0c2978c",
    "signature": "0x35a9b7c2e628db0b332abc0df5d5a7058621e8f52345ad299981ec990ca366c04fe863a48127e8e68fc2b0873deb52931b210adaa1284d7c9dbebfb8810cbaf51b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}