{
  "manageEntity": {
    "action": "Save",
    "entityId": "930253648",
    "entityType": "Track",
    "nonce": "0x9f5206445e43e6c15f431124b9ff25d5b3760c2031c06293b2dc3fd8308412b3",
    "signature": "0x359ed0bba9402d9f9db5fd8911b384e84db3ed824a0f7506ea9e795ea6d26b845513d36669779c406bca5454372d7cfd49406c2facae88b8d933098ab3b275c41b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}