{
  "manageEntity": {
    "action": "Save",
    "entityId": "192321012",
    "entityType": "Track",
    "nonce": "0x972ba9afaba5f5fe4640c14032737a6bb1948b7600281f76e69abc47fa1a15d6",
    "signature": "0x8893ed9096b54aaa0645ba8b2fbb723d333c002d1e66ac04a5af01a132be5d9006d7fff8334c5a86862d34416fc32e07bed17e582b2d27b3a2d73973d5ced6f11b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}