{
  "manageEntity": {
    "action": "Save",
    "entityId": "2070817665",
    "entityType": "Track",
    "nonce": "0x7a3e848886dea4b851b02efd19720c78d0b48dd03618790780d1d8d3f3b90b12",
    "signature": "0xb66a6a0f046bf0d8713a6c58b6d7c667d605f110f65125c732c29aeef02a2cd018605dcf9b22b57c17771571d6ec0453c1ebebdf351ad2aabf327b20a091534b1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}