{
  "manageEntity": {
    "action": "Save",
    "entityId": "1015054771",
    "entityType": "Track",
    "nonce": "0x7f96114efcd51235d6312971dd8ff01d8f61f475af9a362038cf916a8e71123b",
    "signature": "0x867b6bb7ba4f3590fc80df9499df2fff184a32ccec06dcf9d366cf347264afd17be29facfda64d49ad4e03f7f0807b4e09daa87eae2a26223214666b4228b0001c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}