{
  "manageEntity": {
    "action": "Save",
    "entityId": "153692214",
    "entityType": "Track",
    "nonce": "0x3d1e5048a1fbd5ecab4bdd1077ba1023401c3f30856145dfa20a46cbe3a2acda",
    "signature": "0x9f5650dfe040396d8c75201eed2a80b93696bb3af9b9d63b0983a0e908ca9a3b5e9fceecacde5d292242e50e4e5f9e3859fd48c4787f87cf4a45ccf9f888f98c1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}