{
  "manageEntity": {
    "action": "Save",
    "entityId": "2047850361",
    "entityType": "Track",
    "nonce": "0x4644a75c2cc9b9664441fda3ce79f853e2cfbdfdd786a934a2c38cc7a1f26d01",
    "signature": "0xbe94d77d9a94b530e84481588aa12c8a255c09548760a330864ee692fc0846b10fbdcf1643c1ed5c2e9b12604355fef9076acff966c2af6b2a0cc145dcca41e41c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}