{
  "manageEntity": {
    "action": "Save",
    "entityId": "1983894515",
    "entityType": "Track",
    "nonce": "0x318c0f4bf47bf279fa66269d75e51ac516feaacc6ab2bff97cb028fe948efc3a",
    "signature": "0xfed241cf5205cc6c64f60fe8cb2cfae5fab9fcf5d155cc9aad71a02cbd87844c2e958f34549f4971166e8eafd5fc3d4d8c85df98253d55015c853b004a09a9ac1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}