{
  "manageEntity": {
    "action": "Save",
    "entityId": "631628",
    "entityType": "Track",
    "nonce": "0xd066c4c729b965b5e11e6e8b2ea6b478f68e098de69a4fe4b7b23c9e69c1cd63",
    "signature": "0xe05c46725198e185cfadc0f1b52322ae72b86f322c49651057dd44ef5ee2ee404a93c9c57ce67e48e48a35842ce0d30b5002f3f20c1a19a695730c8a746b6f0e1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}