{
  "manageEntity": {
    "action": "Save",
    "entityId": "1099719",
    "entityType": "Track",
    "nonce": "0x2b054702dc8ca222d0fd559fbb56ed270c024a946178d1bf60d4b717b7ed8af4",
    "signature": "0xe64d327539c4e91372b283507dcc897c65c97c8bd1faca0631cfc010ba4b24731e802deb5ac3c95a46a72705cfa9333f4c7c3bd042c5307e23010500bad357501c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}